why arent both ocular lenses used in a binocular microscope?

why arent both ocular lenses used in a binocular microscope?
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1 Answer

Answer :

This is because both ocular lenses are parallel, not in series. The light that passes through the sample is magnified by the objective and then the ocular, not objective and then through two oculars. If they were stacked on top of one another, then yes, you would have to take that into account. Close one eye and observe the apparent size of the image, then do it with the other eye. The image stays the same, right! So only the path of light is important. Simply multiply the ocular (10x) by the objective to get the total magnification.
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